Release Carma 0.2.0

Changes:

• Fix spelling of writeable
• Restructure include directory

Features:

ArrayStore

A class for holding the memory of a Numpy array as an Armadillo matrix in C++ and creating views on the memory as Numpy arrays.
An example use-case would be a C++ class that does not return all data computed, say a Hessian, but should do so on request.
The memory of the views is tied to lifetime of the class.